MCP FastMCP Demo Server

from mcp.server.fastmcp import FastMCP mcp = FastMCP("Demo") @mcp.tool() def add(a: int, b: int) -> int: return a + b @mcp.resource("greeting://{name}") def get_greeting(name: str) -> str: return f"Hello, {name}!" @mcp.prompt() def greet_user(name: str, style: str = "friendly") -> str: styles = { "friendly": "Please write a warm, friendly greeting", "formal": "Please write a formal, professional greeting", "casual": "Please write a casual, relaxed greeting", } return f"{styles.get(style, styles['friendly'])} for someone named {name}." # 🔴 THIS WAS MISSING if __name__ == "__main__": mcp.run()